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E46 (1999 - 2006) The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

Just bought an E46 2003 330 sedan with the 6 speed manual box - wow awesome performance. 231 bhp, 0 to 60 in 6.3 sec and tops out at 155mph. Can these cars be re-mapped? if so what is the sort of performance I could gain?